Finished working on a AM-2061 aka 367A power amplifier. Lots of interesting problems like tarnished relay contacts and interlocks not quite closing. Once these issues were corrected, amp is making power.

Noticed some frequencies penciled in on the Drive and Plate controls.

4,780kc

6,151kc

7,348kc

11,957kc

12,216kc

Any info appreciated.

HNY,

Jim

Logic: Method used to arrive at the wrong conclusion, with confidence. Murphy